In 2013, Van Dam, Martin and Muzychuk constructed a cometric Q− antipodal 4-class association scheme from a GQ of order , t odd, which has a hemisystem. In this paper we characterize this scheme by its Krein array. The techniques which are used involve the triple intersection numbers introduced by Coolsaet and Jurišić.

Reconstructing a generalized quadrangle with a hemisystem from a 4-class association scheme

Monzillo G
2022-01-01

Abstract

In 2013, Van Dam, Martin and Muzychuk constructed a cometric Q− antipodal 4-class association scheme from a GQ of order , t odd, which has a hemisystem. In this paper we characterize this scheme by its Krein array. The techniques which are used involve the triple intersection numbers introduced by Coolsaet and Jurišić.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11587/543830
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